Bottled circa 1970s / 80s, Imported by Challis Stern & Co. Ltd London. This is not a true navy rum as it is left at 42.9% so this is more to be brand recognisable. And draw on the marketable navy and rum connection. From what I can find it appears this company has been disolved. Reviews of the rum seem to suggest its a blend of Guyana and Jamaican rums. “Four Bells” as a title does not appear to have any trademark or copyright or owned brand associated with it: several firms have made use of the title